郑州市重点行业VOCs治理效率与减排潜力研究

Governance Efficiency and Emission Reduction Potential of VOCs from Typical Industries in Zhengzhou

关键词:  VOCs  治理效率  减排潜力  包装印刷  工业涂装  橡胶及塑料制品

Key words:  VOCs  governance efficiency  emission reduction potential  package printing  industrial coating  rubber and plastic products

摘要:

为改善大气环境，深入探索行业减排潜力，本研究选取郑州市包装印刷、工业涂装、橡胶及塑料制品等重点行业作为研究对象，对226家重点企业的挥发性有机物(Volatile Organic Compounds，VOCs)治理现状进行调查，分析量化其VOCs治理效率。结合5种VOCs治理情景，进一步估算重点行业VOCs减排潜力。调查发现，重点行业尚未完成涉VOCs排放原辅料的源头替代且末端治理技术以紫外线(UV)光氧+活性炭吸附、活性炭吸附+催化燃烧、蓄热式燃烧为主，同时蓄热式燃烧、直接燃烧治理效率相对较高，平均治理效率均在85%以上。研究表明，VOCs进口浓度是影响治理效率的主要因素，如催化燃烧技术在处理浓度为20-160 mg/m³的废气时，浓度越高处理效果越好。在综合各环节治理的情景下，重点企业的VOCs减排潜力最大，减排率为62%；从源头、过程、末端单个环节治理来看，重点企业更换高效末端治理设施的减排潜力最大，减排率达44%，其次为重点企业维护末端治理设施(减排率39%)和源头替代(减排率32%)。综上，通过源头替代、过程控制、末端治理等方式，可有效提升郑州市重点行业VOCs的治理效率。本研究可为管理部门及企业的VOCs精细化管控和减排提供科技支撑。

Abstract:

In order to improve the atmospheric environment and explore the emission reduction potential of industries,this study selected key industries such as package printing,industrial coating,and rubber and plastic products in Zhengzhou as research objects.The current governance situations of Volatile Organic Compounds (VOCs) in 226 key enterprises were investigated,and their VOCs governance efficiency was analyzed.Furthermore,the emission reduction potential for VOCs was estimated in five treatment scenarios.The results indicated that source substitution of raw and auxiliary materials with VOCs content had not been completed in key industries,and end-of-pipe treatments mainly comprised ultraviolet (UV) photo oxidation+activated carbon adsorption,activated carbon adsorption+catalytic combustion,and regenerative thermal combustion.Regenerative thermal combustion and direct combustion had high governance efficiency,with the means over 85%.The inlet concentration of VOCs was the main factor affecting the governance efficiency.When catalytic combustion technology is used to treat exhaust gas with a concentration of 20-160 mg/m³,the higher the concentration, the better the treatment effect.Among the five emission reduction scenarios,the comprehensive scenario considering all stages exhibited the highest emission reduction potential,achieving a reduction rate of 62%.Regarding the emission reduction potential of individual governance stages,replacing high efficiency treatment facilities at the end-of-pipe stage had the strongest potential,achieving a reduction rate of 44%,followed by end-of-pipe maintenance (39%) and source substitution (32%).In summary,the governance efficiency of VOCs in key industries in Zhengzhou is effectively enhanced by source substitution,process control,and end treatment.This study provides scientific and technological support for the management departments and enterprises in the precise treatment and emission reduction of VOCs.